Daily Archives: December 13, 2011

多項選擇題 5

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Multiple Choices 5

這段改編自 2010 年 5 月 19 日的對話。

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這題多項選擇題，並沒有指明 R_1 和 R_2 的電阻值，是否相等。那就即是話，無論 R_1 和 R_2 是否相等，你都會得到，同一個答案。既然是那樣，你就不妨假設，R_1 和 R_2 相等。那樣，你就可以在，不失最終正確答案的前提下，大幅度地簡化了運算。

— Me@2011.12.13

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2011.12.13 Tuesday (c) All rights reserved by ACHK

Quantum probability and Classical probability, 5

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Probability theory 1.3

Quantum probability is almost the same as classical probability.

The only difference is that while classical probability is due to ignorance, quantum probability is due to superposition of eigenstates of the universal wave function and the ignorance of its details. We ignore the microstate details of the measuring-device/observer.

If we know all the details of the universal wave function, we will be able to predict what the final wave function will be. The final wave function will still be a superposition of a lot of different eigenstates. There is no real wave function collapse.

— Me@2011.11.20

2011.12.13 Tuesday (c) All rights reserved by ACHK